Muaj ntau txoj hauv kev los cais cov tshuab xaws, thiab qhov ntau dua yog kom paub qhov txawv lawv los ntawm kev xaws thiab siv. Cov xaws ntawm lub tshuab xaws tuaj yeem faib ua ob hom: xauv plooj thiab xaws saw. Qhov xauv plooj yog qhov feem ntau. Nws suav nrog ob txoj hlua khi, uas sib txuas ua ke ib yam li txoj hlua sib tw. Lub ntsiab lus sib tshuam yog nyob nruab nrab ntawm cov khoom siv xaws. Los ntawm ntu ntu ntawm txoj hlua, ob txoj hlua zoo li ob lub xauv xauv rau ib leeg, yog li lawv hu ua xauv xauv. Cov hlua no yog siv rau cov ntaub ntawv xaws xws li paj rwb, ntaub ntaub plaub lossis tawv tawv uas muaj qis qis. Sab pem hauv ntej thiab sab nraub qaum muaj cov duab zoo ib yam, zoo li kab kab. Cov xaws tau muab faib sib faib, thiab qhov nrawm ntawm xaws yog feem ntau siab dua li ntawm xaws tes.
Cov saw hlau tau tsim los ntawm kev sib txuas tus kheej lossis kev sib txuas ntawm cov loops. Feem ntau siv yog ib leeg-xov saw, ob txoj xov xov thiab peb-xov overlock plooj. Hom kev xaws no yog tus yam ntxwv ntawm nws cov elasticity, thiab tuaj yeem ncab nrog cov khoom siv xaws yam tsis tau tsoo lub plooj. Nws tsim nyog rau khaub ncaws ua los ntawm cov ntaub ywj lossis cov khoom lag luam thiab cov tsoos tsho uas yooj yim los xaws.
Ib qho ntxiv, cov tshuab xaws tuaj yeem faib ua tsev neeg, kev tsim khoom, thiab kev pabcuam kev lag luam raws li lawv siv, thiab tseem tuaj yeem faib ua cov tshuab xaws xaws tes, tshuab xaws pedal, thiab tshuab xaws hluav taws xob raws li kev tsav tsheb.
(1) Tom qab ua haujlwm tiav, ntxig lub koob rau hauv rab koob lub phaj, tsa lub taub hau nias, thiab npog lub taub hau tshuab nrog lub tshuab npog kom tiv thaiv kev nkag los ntawm hmoov av.
(2) Thaum pib ua haujlwm, xub txheeb xyuas qhov tseem ceeb, qhov hnyav thiab hnyav npaum li cas thaum koj nqis mus rau nws, seb puas muaj lub suab tshwj xeeb, seb rab koob zoo li qub, thiab lwm yam Yog tias pom muaj qhov txawv txav, nws yuav tsum yog hloov kho lub sijhawm.
(3) Tom qab lub tshuab tau siv rau lub sijhawm ntev, yuav tsum tau kho qhov loj. Yog pom cov khoom uas hnav loj dua, hloov lawv nrog cov tshiab.